Have at 23:04 from the Amazon, the set of Logitech bekommem, as always very fast delivery (2days) Top !!!! have only the software for the Unifying receiver down had landed, (previously 1 day) then turned on in the PC USB keyboard and eingesteckt.Maus and already everything went. Operating Systems Win 7PRO 64 bits. So I am thrilled with the mouse and keyboard, as described must functions at all to use one still on the download page Logitech Set Point, I have not, I will still try